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<h1>ContactManager.cc</h1><a href="ContactManager_8cc.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * Copyright 2004-2006 Intel Corporation</span>
<a name="l00003"></a>00003 <span class="comment"> * </span>
<a name="l00004"></a>00004 <span class="comment"> * Licensed under the Apache License, Version 2.0 (the "License");</span>
<a name="l00005"></a>00005 <span class="comment"> * you may not use this file except in compliance with the License.</span>
<a name="l00006"></a>00006 <span class="comment"> * You may obtain a copy of the License at</span>
<a name="l00007"></a>00007 <span class="comment"> * </span>
<a name="l00008"></a>00008 <span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span>
<a name="l00009"></a>00009 <span class="comment"> * </span>
<a name="l00010"></a>00010 <span class="comment"> * Unless required by applicable law or agreed to in writing, software</span>
<a name="l00011"></a>00011 <span class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</span>
<a name="l00012"></a>00012 <span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
<a name="l00013"></a>00013 <span class="comment"> * See the License for the specific language governing permissions and</span>
<a name="l00014"></a>00014 <span class="comment"> * limitations under the License.</span>
<a name="l00015"></a>00015 <span class="comment"> */</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="preprocessor">#ifdef HAVE_CONFIG_H</span>
<a name="l00018"></a>00018 <span class="preprocessor"></span><span class="preprocessor"># include <<a class="code" href="dtn-config_8h.html">dtn-config.h</a>></span>
<a name="l00019"></a>00019 <span class="preprocessor">#endif</span>
<a name="l00020"></a>00020 <span class="preprocessor"></span>
<a name="l00021"></a>00021 <span class="preprocessor">#include <oasys/util/StringBuffer.h></span>
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <span class="preprocessor">#include "<a class="code" href="ContactManager_8h.html">ContactManager.h</a>"</span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="Contact_8h.html">Contact.h</a>"</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include "<a class="code" href="contacts_2Link_8h.html">Link.h</a>"</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include "<a class="code" href="BundleDaemon_8h.html">bundling/BundleDaemon.h</a>"</span>
<a name="l00027"></a>00027 <span class="preprocessor">#include "<a class="code" href="BundleEvent_8h.html">bundling/BundleEvent.h</a>"</span>
<a name="l00028"></a>00028 <span class="preprocessor">#include "<a class="code" href="ConvergenceLayer_8h.html">conv_layers/ConvergenceLayer.h</a>"</span>
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="keyword">namespace </span>dtn {
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00033"></a><a class="code" href="classdtn_1_1ContactManager.html#be5c068e60615f79e957e9561278e7d3">00033</a> <a class="code" href="classdtn_1_1ContactManager.html#be5c068e60615f79e957e9561278e7d3" title="Constructor / Destructor.">ContactManager::ContactManager</a>()
<a name="l00034"></a>00034 : <a class="code" href="classdtn_1_1BundleEventHandler.html" title="Both the BundleDaemon and all the BundleRouter classes need to process the various...">BundleEventHandler</a>(<span class="stringliteral">"ContactManager"</span>, <span class="stringliteral">"/dtn/contact/manager"</span>),
<a name="l00035"></a>00035 opportunistic_cnt_(0)
<a name="l00036"></a>00036 {
<a name="l00037"></a>00037 <a class="code" href="classdtn_1_1ContactManager.html#ade8809a7e4850c4a55fe497c14a8ca2" title="Set of all links.">links_</a> = <span class="keyword">new</span> <a class="code" href="classdtn_1_1LinkSet.html" title="Set of links.">LinkSet</a>();
<a name="l00038"></a>00038 }
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00041"></a><a class="code" href="classdtn_1_1ContactManager.html#82c562281c2188a81b9aa04c42704c8d">00041</a> <a class="code" href="classdtn_1_1ContactManager.html#82c562281c2188a81b9aa04c42704c8d">ContactManager::~ContactManager</a>()
<a name="l00042"></a>00042 {
<a name="l00043"></a>00043 <span class="keyword">delete</span> <a class="code" href="classdtn_1_1ContactManager.html#ade8809a7e4850c4a55fe497c14a8ca2" title="Set of all links.">links_</a>;
<a name="l00044"></a>00044 }
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00047"></a>00047 <span class="keywordtype">bool</span>
<a name="l00048"></a><a class="code" href="classdtn_1_1ContactManager.html#c0964b1fa4e2c5fc4c841d7261cf5929">00048</a> <a class="code" href="classdtn_1_1ContactManager.html#c0964b1fa4e2c5fc4c841d7261cf5929" title="Add a link if the contact manager does not already have a link by the same name.">ContactManager::add_new_link</a>(<span class="keyword">const</span> <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a>& link)
<a name="l00049"></a>00049 {
<a name="l00050"></a>00050 oasys::ScopeLock l(&<a class="code" href="classdtn_1_1ContactManager.html#2748e832f0ce4a43762af436e744dfdc" title="Lock to protect internal data structures.">lock_</a>, <span class="stringliteral">"ContactManager::add_new_link"</span>);
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(link != NULL);
<a name="l00053"></a>00053 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(!link->isdeleted());
<a name="l00054"></a>00054
<a name="l00055"></a>00055 log_debug(<span class="stringliteral">"adding NEW link %s"</span>, link->name());
<a name="l00056"></a>00056 <span class="keywordflow">if</span> (<a class="code" href="classdtn_1_1ContactManager.html#b7beecc3d70f0917ac6c94b05c134320" title="Check if contact manager already has this link.">has_link</a>(link->name())) {
<a name="l00057"></a>00057 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00058"></a>00058 }
<a name="l00059"></a>00059 <a class="code" href="classdtn_1_1ContactManager.html#ade8809a7e4850c4a55fe497c14a8ca2" title="Set of all links.">links_</a>->insert(<a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a>(link.object(), <span class="stringliteral">"ContactManager"</span>));
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="keywordflow">if</span> (!link->is_create_pending()) {
<a name="l00062"></a>00062 log_debug(<span class="stringliteral">"posting LinkCreatedEvent"</span>);
<a name="l00063"></a>00063 <a class="code" href="classdtn_1_1BundleDaemon.html#370a80f7dd9fd9297e76d7f830d737a8" title="Queues the event at the tail of the queue for processing by the daemon thread.">BundleDaemon::post</a>(<span class="keyword">new</span> <a class="code" href="classdtn_1_1LinkCreatedEvent.html" title="Event class for link creation events.">LinkCreatedEvent</a>(link));
<a name="l00064"></a>00064 }
<a name="l00065"></a>00065
<a name="l00066"></a>00066 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00067"></a>00067 }
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00070"></a>00070 <span class="keywordtype">void</span>
<a name="l00071"></a><a class="code" href="classdtn_1_1ContactManager.html#54d224d2c2a8436d06f44d8880975cd5">00071</a> <a class="code" href="classdtn_1_1ContactManager.html#54d224d2c2a8436d06f44d8880975cd5" title="Delete a link.">ContactManager::del_link</a>(<span class="keyword">const</span> <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a>& link, <span class="keywordtype">bool</span> wait,
<a name="l00072"></a>00072 <a class="code" href="classdtn_1_1ContactEvent.html#e20f7357509a2bcca3d8e6c8daf552f7" title="Reason codes for contact state operations.">ContactEvent::reason_t</a> reason)
<a name="l00073"></a>00073 {
<a name="l00074"></a>00074 oasys::ScopeLock l(&<a class="code" href="classdtn_1_1ContactManager.html#2748e832f0ce4a43762af436e744dfdc" title="Lock to protect internal data structures.">lock_</a>, <span class="stringliteral">"ContactManager::del_link"</span>);
<a name="l00075"></a>00075 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(link != NULL);
<a name="l00076"></a>00076
<a name="l00077"></a>00077 <span class="keywordflow">if</span> (!<a class="code" href="classdtn_1_1ContactManager.html#b7beecc3d70f0917ac6c94b05c134320" title="Check if contact manager already has this link.">has_link</a>(link)) {
<a name="l00078"></a>00078 log_err(<span class="stringliteral">"ContactManager::del_link: link %s does not exist"</span>,
<a name="l00079"></a>00079 link->name());
<a name="l00080"></a>00080 <span class="keywordflow">return</span>;
<a name="l00081"></a>00081 }
<a name="l00082"></a>00082 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(!link->isdeleted());
<a name="l00083"></a>00083
<a name="l00084"></a>00084 log_debug(<span class="stringliteral">"ContactManager::del_link: deleting link %s"</span>, link->name());
<a name="l00085"></a>00085
<a name="l00086"></a>00086 <span class="keywordflow">if</span> (!wait)
<a name="l00087"></a>00087 link->delete_link();
<a name="l00088"></a>00088
<a name="l00089"></a>00089 <span class="comment">// Close the link if it is open or in the process of being opened.</span>
<a name="l00090"></a>00090 <span class="keywordflow">if</span> (link->isopen() || link->isopening()) {
<a name="l00091"></a>00091 BundleDaemon::instance()->post(
<a name="l00092"></a>00092 <span class="keyword">new</span> <a class="code" href="classdtn_1_1LinkStateChangeRequest.html" title="Request class for link state change requests that are sent to the daemon thread for...">LinkStateChangeRequest</a>(link, <a class="code" href="classdtn_1_1Link.html#1bf2479a21276737f73204a3c46508a32e48e0c707487f143c54dd1cd5185323" title="Bogus state that&#39;s never actually used in the Link state_ variable, but is used...">Link::CLOSED</a>, reason));
<a name="l00093"></a>00093 }
<a name="l00094"></a>00094
<a name="l00095"></a>00095 <span class="comment">// Cancel the link's availability timer (if one exists).</span>
<a name="l00096"></a>00096 AvailabilityTimerMap::iterator iter = <a class="code" href="classdtn_1_1ContactManager.html#1176e45365aed6d561b8f39cacb72e57">availability_timers_</a>.find(link);
<a name="l00097"></a>00097 <span class="keywordflow">if</span> (iter != <a class="code" href="classdtn_1_1ContactManager.html#1176e45365aed6d561b8f39cacb72e57">availability_timers_</a>.end()) {
<a name="l00098"></a>00098 <a class="code" href="classdtn_1_1ContactManager_1_1LinkAvailabilityTimer.html" title="Timer class used to re-enable broken ondemand links.">LinkAvailabilityTimer</a>* timer = iter->second;
<a name="l00099"></a>00099 <a class="code" href="classdtn_1_1ContactManager.html#1176e45365aed6d561b8f39cacb72e57">availability_timers_</a>.erase(link);
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="comment">// Attempt to cancel the timer, relying on the timer system to clean</span>
<a name="l00102"></a>00102 <span class="comment">// up the timer state once it bubbles to the top of the timer queue.</span>
<a name="l00103"></a>00103 <span class="comment">// If the timer is in the process of firing (i.e., race condition),</span>
<a name="l00104"></a>00104 <span class="comment">// the timer should clean itself up in the timeout handler.</span>
<a name="l00105"></a>00105 <span class="keywordflow">if</span> (!timer->cancel()) {
<a name="l00106"></a>00106 log_warn(<span class="stringliteral">"ContactManager::del_link: "</span>
<a name="l00107"></a>00107 <span class="stringliteral">"failed to cancel availability timer -- race condition"</span>);
<a name="l00108"></a>00108 }
<a name="l00109"></a>00109 }
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <a class="code" href="classdtn_1_1ContactManager.html#ade8809a7e4850c4a55fe497c14a8ca2" title="Set of all links.">links_</a>->erase(link);
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="keywordflow">if</span> (wait) {
<a name="l00114"></a>00114 l.unlock();
<a name="l00115"></a>00115 <span class="comment">// If some parent calling del_link already locked the Contact Manager,</span>
<a name="l00116"></a>00116 <span class="comment">// the lock will remain locked, and an event ahead of the</span>
<a name="l00117"></a>00117 <span class="comment">// LinkDeletedEvent may wait for the lock, causing deadlock</span>
<a name="l00118"></a>00118 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(!<a class="code" href="classdtn_1_1ContactManager.html#6edebce9cf6080f854039f8df593cfec" title="Accessor for the ContactManager internal lock.">lock</a>()->is_locked_by_me());
<a name="l00119"></a>00119 oasys::Notifier notifier(<span class="stringliteral">"ContactManager::del_link"</span>);
<a name="l00120"></a>00120 <a class="code" href="classdtn_1_1BundleDaemon.html#bb88ebba32e4e95a96ee76b3f91d9052" title="Post the given event and wait for it to be processed by the daemon thread or for...">BundleDaemon::post_and_wait</a>(<span class="keyword">new</span> <a class="code" href="classdtn_1_1LinkDeletedEvent.html" title="Event class for link deletion events.">LinkDeletedEvent</a>(link), &notifier);
<a name="l00121"></a>00121 link->delete_link();
<a name="l00122"></a>00122 } <span class="keywordflow">else</span> {
<a name="l00123"></a>00123 <a class="code" href="classdtn_1_1BundleDaemon.html#370a80f7dd9fd9297e76d7f830d737a8" title="Queues the event at the tail of the queue for processing by the daemon thread.">BundleDaemon::post</a>(<span class="keyword">new</span> <a class="code" href="classdtn_1_1LinkDeletedEvent.html" title="Event class for link deletion events.">LinkDeletedEvent</a>(link));
<a name="l00124"></a>00124 }
<a name="l00125"></a>00125 }
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00128"></a>00128 <span class="keywordtype">bool</span>
<a name="l00129"></a><a class="code" href="classdtn_1_1ContactManager.html#b7beecc3d70f0917ac6c94b05c134320">00129</a> <a class="code" href="classdtn_1_1ContactManager.html#b7beecc3d70f0917ac6c94b05c134320" title="Check if contact manager already has this link.">ContactManager::has_link</a>(<span class="keyword">const</span> <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a>& link)
<a name="l00130"></a>00130 {
<a name="l00131"></a>00131 oasys::ScopeLock l(&<a class="code" href="classdtn_1_1ContactManager.html#2748e832f0ce4a43762af436e744dfdc" title="Lock to protect internal data structures.">lock_</a>, <span class="stringliteral">"ContactManager::has_link"</span>);
<a name="l00132"></a>00132 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(link != NULL);
<a name="l00133"></a>00133
<a name="l00134"></a>00134 LinkSet::iterator iter = <a class="code" href="classdtn_1_1ContactManager.html#ade8809a7e4850c4a55fe497c14a8ca2" title="Set of all links.">links_</a>->find(link);
<a name="l00135"></a>00135 <span class="keywordflow">if</span> (iter == <a class="code" href="classdtn_1_1ContactManager.html#ade8809a7e4850c4a55fe497c14a8ca2" title="Set of all links.">links_</a>->end())
<a name="l00136"></a>00136 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00137"></a>00137 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00138"></a>00138 }
<a name="l00139"></a>00139
<a name="l00140"></a>00140 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00141"></a>00141 <span class="keywordtype">bool</span>
<a name="l00142"></a><a class="code" href="classdtn_1_1ContactManager.html#3a3b3c9dfa58d1e88b80c5ad19fd1291">00142</a> <a class="code" href="classdtn_1_1ContactManager.html#b7beecc3d70f0917ac6c94b05c134320" title="Check if contact manager already has this link.">ContactManager::has_link</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* name)
<a name="l00143"></a>00143 {
<a name="l00144"></a>00144 oasys::ScopeLock l(&<a class="code" href="classdtn_1_1ContactManager.html#2748e832f0ce4a43762af436e744dfdc" title="Lock to protect internal data structures.">lock_</a>, <span class="stringliteral">"ContactManager::has_link"</span>);
<a name="l00145"></a>00145 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(link != NULL);
<a name="l00146"></a>00146
<a name="l00147"></a>00147 LinkSet::iterator iter;
<a name="l00148"></a>00148 <span class="keywordflow">for</span> (iter = <a class="code" href="classdtn_1_1ContactManager.html#ade8809a7e4850c4a55fe497c14a8ca2" title="Set of all links.">links_</a>->begin(); iter != <a class="code" href="classdtn_1_1ContactManager.html#ade8809a7e4850c4a55fe497c14a8ca2" title="Set of all links.">links_</a>->end(); ++iter) {
<a name="l00149"></a>00149 <span class="keywordflow">if</span> (strcasecmp((*iter)->name(), name) == 0)
<a name="l00150"></a>00150 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00151"></a>00151 }
<a name="l00152"></a>00152 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00153"></a>00153 }
<a name="l00154"></a>00154
<a name="l00155"></a>00155 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00156"></a>00156 <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a>
<a name="l00157"></a><a class="code" href="classdtn_1_1ContactManager.html#4a31131016ed7f6b11ce6823dd7abe91">00157</a> <a class="code" href="classdtn_1_1ContactManager.html#4a31131016ed7f6b11ce6823dd7abe91" title="Finds link corresponding to this name.">ContactManager::find_link</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* name)
<a name="l00158"></a>00158 {
<a name="l00159"></a>00159 oasys::ScopeLock l(&<a class="code" href="classdtn_1_1ContactManager.html#2748e832f0ce4a43762af436e744dfdc" title="Lock to protect internal data structures.">lock_</a>, <span class="stringliteral">"ContactManager::find_link"</span>);
<a name="l00160"></a>00160
<a name="l00161"></a>00161 LinkSet::iterator iter;
<a name="l00162"></a>00162 <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a> link(<span class="stringliteral">"ContactManager::find_link: return value"</span>);
<a name="l00163"></a>00163
<a name="l00164"></a>00164 <span class="keywordflow">for</span> (iter = <a class="code" href="classdtn_1_1ContactManager.html#ade8809a7e4850c4a55fe497c14a8ca2" title="Set of all links.">links_</a>->begin(); iter != <a class="code" href="classdtn_1_1ContactManager.html#ade8809a7e4850c4a55fe497c14a8ca2" title="Set of all links.">links_</a>->end(); ++iter) {
<a name="l00165"></a>00165 <span class="keywordflow">if</span> (strcasecmp((*iter)->name(), name) == 0) {
<a name="l00166"></a>00166 link = *iter;
<a name="l00167"></a>00167 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(!link->isdeleted());
<a name="l00168"></a>00168 <span class="keywordflow">return</span> link;
<a name="l00169"></a>00169 }
<a name="l00170"></a>00170 }
<a name="l00171"></a>00171 <span class="keywordflow">return</span> link;
<a name="l00172"></a>00172 }
<a name="l00173"></a>00173
<a name="l00174"></a>00174 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00175"></a>00175 <span class="keyword">const</span> <a class="code" href="classdtn_1_1LinkSet.html" title="Set of links.">LinkSet</a>*
<a name="l00176"></a><a class="code" href="classdtn_1_1ContactManager.html#957c6cfac0575444e0a9a04a12708cf6">00176</a> <a class="code" href="classdtn_1_1ContactManager.html#957c6cfac0575444e0a9a04a12708cf6" title="Return the list of links.">ContactManager::links</a>()
<a name="l00177"></a>00177 {
<a name="l00178"></a>00178 ASSERTF(<a class="code" href="classdtn_1_1ContactManager.html#2748e832f0ce4a43762af436e744dfdc" title="Lock to protect internal data structures.">lock_</a>.is_locked_by_me(),
<a name="l00179"></a>00179 <span class="stringliteral">"ContactManager::links must be called while holding lock"</span>);
<a name="l00180"></a>00180 <span class="keywordflow">return</span> <a class="code" href="classdtn_1_1ContactManager.html#ade8809a7e4850c4a55fe497c14a8ca2" title="Set of all links.">links_</a>;
<a name="l00181"></a>00181 }
<a name="l00182"></a>00182
<a name="l00183"></a>00183 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00184"></a>00184 <span class="keywordtype">void</span>
<a name="l00185"></a><a class="code" href="classdtn_1_1ContactManager_1_1LinkAvailabilityTimer.html#feb96189c25768c57686e736b44c5537">00185</a> <a class="code" href="classdtn_1_1ContactManager_1_1LinkAvailabilityTimer.html#feb96189c25768c57686e736b44c5537">ContactManager::LinkAvailabilityTimer::timeout</a>(<span class="keyword">const</span> <span class="keyword">struct</span> timeval& now)
<a name="l00186"></a>00186 {
<a name="l00187"></a>00187 (void)now;
<a name="l00188"></a>00188 <a class="code" href="classdtn_1_1ContactManager_1_1LinkAvailabilityTimer.html#a4b289d06396223e1f165c6d1f67b010" title="The contact manager object.">cm_</a>-><a class="code" href="classdtn_1_1ContactManager.html#3041f1992bb72292e528a551a07cfcee" title="Reopen a broken link.">reopen_link</a>(<a class="code" href="classdtn_1_1ContactManager_1_1LinkAvailabilityTimer.html#dfd01a243c38b2cc3da001894f2edd7d" title="The link in question.">link_</a>);
<a name="l00189"></a>00189 <span class="keyword">delete</span> <span class="keyword">this</span>;
<a name="l00190"></a>00190 }
<a name="l00191"></a>00191
<a name="l00192"></a>00192 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00193"></a>00193 <span class="keywordtype">void</span>
<a name="l00194"></a><a class="code" href="classdtn_1_1ContactManager.html#3041f1992bb72292e528a551a07cfcee">00194</a> <a class="code" href="classdtn_1_1ContactManager.html#3041f1992bb72292e528a551a07cfcee" title="Reopen a broken link.">ContactManager::reopen_link</a>(<span class="keyword">const</span> <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a>& link)
<a name="l00195"></a>00195 {
<a name="l00196"></a>00196 oasys::ScopeLock l(&<a class="code" href="classdtn_1_1ContactManager.html#2748e832f0ce4a43762af436e744dfdc" title="Lock to protect internal data structures.">lock_</a>, <span class="stringliteral">"ContactManager::reopen_link"</span>);
<a name="l00197"></a>00197 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(link != NULL);
<a name="l00198"></a>00198
<a name="l00199"></a>00199 log_debug(<span class="stringliteral">"reopen link %s"</span>, link->name());
<a name="l00200"></a>00200
<a name="l00201"></a>00201 <a class="code" href="classdtn_1_1ContactManager.html#1176e45365aed6d561b8f39cacb72e57">availability_timers_</a>.erase(link);
<a name="l00202"></a>00202
<a name="l00203"></a>00203 <span class="keywordflow">if</span> (!<a class="code" href="classdtn_1_1ContactManager.html#b7beecc3d70f0917ac6c94b05c134320" title="Check if contact manager already has this link.">has_link</a>(link)) {
<a name="l00204"></a>00204 log_warn(<span class="stringliteral">"ContactManager::reopen_link: "</span>
<a name="l00205"></a>00205 <span class="stringliteral">"link %s does not exist"</span>, link->name());
<a name="l00206"></a>00206 <span class="keywordflow">return</span>;
<a name="l00207"></a>00207 }
<a name="l00208"></a>00208 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(!link->isdeleted());
<a name="l00209"></a>00209
<a name="l00210"></a>00210 <span class="keywordflow">if</span> (link->state() == <a class="code" href="classdtn_1_1Link.html#1bf2479a21276737f73204a3c46508a3fcb80aea04644bdc565b13fa371b2e1e" title="The link is closed and not able to be opened currently.">Link::UNAVAILABLE</a>) {
<a name="l00211"></a>00211 <a class="code" href="classdtn_1_1BundleDaemon.html#370a80f7dd9fd9297e76d7f830d737a8" title="Queues the event at the tail of the queue for processing by the daemon thread.">BundleDaemon::post</a>(
<a name="l00212"></a>00212 <span class="keyword">new</span> <a class="code" href="classdtn_1_1LinkStateChangeRequest.html" title="Request class for link state change requests that are sent to the daemon thread for...">LinkStateChangeRequest</a>(link, <a class="code" href="classdtn_1_1Link.html#1bf2479a21276737f73204a3c46508a3ec7a744ed0ed07ccb2b255a0d76192c8" title="A convergence layer session has been established, and the link has capacity for a...">Link::OPEN</a>,
<a name="l00213"></a>00213 <a class="code" href="classdtn_1_1ContactEvent.html#e20f7357509a2bcca3d8e6c8daf552f7fe3939848fd2dc31d31aec1c8c1f3c2a" title="Re-establish link after failure.">ContactEvent::RECONNECT</a>));
<a name="l00214"></a>00214 } <span class="keywordflow">else</span> {
<a name="l00215"></a>00215 <span class="comment">// state race (possibly due to user action)</span>
<a name="l00216"></a>00216 log_err(<span class="stringliteral">"availability timer fired for link %s but state is %s"</span>,
<a name="l00217"></a>00217 link->name(), <a class="code" href="classdtn_1_1Link.html#9681a1ea52ef3c5db6dcf37b04e5c280" title="Convert a link state into a string.">Link::state_to_str</a>(link->state()));
<a name="l00218"></a>00218 }
<a name="l00219"></a>00219 }
<a name="l00220"></a>00220
<a name="l00221"></a>00221 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00222"></a>00222 <span class="keywordtype">void</span>
<a name="l00223"></a><a class="code" href="classdtn_1_1ContactManager.html#115f287ba3bdd3eff46ea65ca64572cc">00223</a> <a class="code" href="classdtn_1_1ContactManager.html#115f287ba3bdd3eff46ea65ca64572cc" title="Event handler when a link has been created.">ContactManager::handle_link_created</a>(<a class="code" href="classdtn_1_1LinkCreatedEvent.html" title="Event class for link creation events.">LinkCreatedEvent</a>* event)
<a name="l00224"></a>00224 {
<a name="l00225"></a>00225 oasys::ScopeLock l(&<a class="code" href="classdtn_1_1ContactManager.html#2748e832f0ce4a43762af436e744dfdc" title="Lock to protect internal data structures.">lock_</a>, <span class="stringliteral">"ContactManager::handle_link_created"</span>);
<a name="l00226"></a>00226
<a name="l00227"></a>00227 <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a> link = <span class="keyword">event</span>->link_;
<a name="l00228"></a>00228 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(link != NULL);
<a name="l00229"></a>00229
<a name="l00230"></a>00230 <span class="keywordflow">if</span>(link->isdeleted())
<a name="l00231"></a>00231 {
<a name="l00232"></a>00232 log_warn(<span class="stringliteral">"ContactManager::handle_link_created: "</span>
<a name="l00233"></a>00233 <span class="stringliteral">"link %s is being deleted"</span>, link->name());
<a name="l00234"></a>00234 <span class="keywordflow">return</span>;
<a name="l00235"></a>00235 }
<a name="l00236"></a>00236
<a name="l00237"></a>00237 <span class="keywordflow">if</span> (!<a class="code" href="classdtn_1_1ContactManager.html#b7beecc3d70f0917ac6c94b05c134320" title="Check if contact manager already has this link.">has_link</a>(link)) {
<a name="l00238"></a>00238 log_err(<span class="stringliteral">"ContactManager::handle_link_created: "</span>
<a name="l00239"></a>00239 <span class="stringliteral">"link %s does not exist"</span>, link->name());
<a name="l00240"></a>00240 <span class="keywordflow">return</span>;
<a name="l00241"></a>00241 }
<a name="l00242"></a>00242
<a name="l00243"></a>00243 <span class="comment">// Post initial state events; MOVED from Link::create_link().</span>
<a name="l00244"></a>00244 link->set_initial_state();
<a name="l00245"></a>00245 }
<a name="l00246"></a>00246
<a name="l00247"></a>00247 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00248"></a>00248 <span class="keywordtype">void</span>
<a name="l00249"></a><a class="code" href="classdtn_1_1ContactManager.html#3f3ba023d235c5dc10c0a98ff8c92c37">00249</a> <a class="code" href="classdtn_1_1ContactManager.html#3f3ba023d235c5dc10c0a98ff8c92c37" title="Event handler when a link becomes unavailable.">ContactManager::handle_link_available</a>(<a class="code" href="classdtn_1_1LinkAvailableEvent.html" title="Event class for link available events.">LinkAvailableEvent</a>* event)
<a name="l00250"></a>00250 {
<a name="l00251"></a>00251 oasys::ScopeLock l(&<a class="code" href="classdtn_1_1ContactManager.html#2748e832f0ce4a43762af436e744dfdc" title="Lock to protect internal data structures.">lock_</a>, <span class="stringliteral">"ContactManager::handle_link_available"</span>);
<a name="l00252"></a>00252
<a name="l00253"></a>00253 <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a> link = <span class="keyword">event</span>->link_;
<a name="l00254"></a>00254 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(link != NULL);
<a name="l00255"></a>00255
<a name="l00256"></a>00256 <span class="keywordflow">if</span>(link->isdeleted())
<a name="l00257"></a>00257 {
<a name="l00258"></a>00258 log_warn(<span class="stringliteral">"ContactManager::handle_link_available: "</span>
<a name="l00259"></a>00259 <span class="stringliteral">"link %s is being deleted"</span>, link->name());
<a name="l00260"></a>00260 <span class="keywordflow">return</span>;
<a name="l00261"></a>00261 }
<a name="l00262"></a>00262
<a name="l00263"></a>00263 <span class="keywordflow">if</span> (!<a class="code" href="classdtn_1_1ContactManager.html#b7beecc3d70f0917ac6c94b05c134320" title="Check if contact manager already has this link.">has_link</a>(link)) {
<a name="l00264"></a>00264 log_warn(<span class="stringliteral">"ContactManager::handle_link_available: "</span>
<a name="l00265"></a>00265 <span class="stringliteral">"link %s does not exist"</span>, link->name());
<a name="l00266"></a>00266 <span class="keywordflow">return</span>;
<a name="l00267"></a>00267 }
<a name="l00268"></a>00268
<a name="l00269"></a>00269 AvailabilityTimerMap::iterator iter;
<a name="l00270"></a>00270 iter = <a class="code" href="classdtn_1_1ContactManager.html#1176e45365aed6d561b8f39cacb72e57">availability_timers_</a>.find(link);
<a name="l00271"></a>00271 <span class="keywordflow">if</span> (iter == <a class="code" href="classdtn_1_1ContactManager.html#1176e45365aed6d561b8f39cacb72e57">availability_timers_</a>.end()) {
<a name="l00272"></a>00272 <span class="keywordflow">return</span>; <span class="comment">// no timer for this link</span>
<a name="l00273"></a>00273 }
<a name="l00274"></a>00274
<a name="l00275"></a>00275 <a class="code" href="classdtn_1_1ContactManager_1_1LinkAvailabilityTimer.html" title="Timer class used to re-enable broken ondemand links.">LinkAvailabilityTimer</a>* timer = iter->second;
<a name="l00276"></a>00276 <a class="code" href="classdtn_1_1ContactManager.html#1176e45365aed6d561b8f39cacb72e57">availability_timers_</a>.erase(link);
<a name="l00277"></a>00277
<a name="l00278"></a>00278 <span class="comment">// try to cancel the timer and rely on the timer system to clean</span>
<a name="l00279"></a>00279 <span class="comment">// it up once it bubbles to the top of the queue... if there's a</span>
<a name="l00280"></a>00280 <span class="comment">// race and the timer is in the process of firing, it should clean</span>
<a name="l00281"></a>00281 <span class="comment">// itself up in the timeout handler.</span>
<a name="l00282"></a>00282 <span class="keywordflow">if</span> (!timer->cancel()) {
<a name="l00283"></a>00283 log_warn(<span class="stringliteral">"ContactManager::handle_link_available: "</span>
<a name="l00284"></a>00284 <span class="stringliteral">"can't cancel availability timer: race condition"</span>);
<a name="l00285"></a>00285 }
<a name="l00286"></a>00286 }
<a name="l00287"></a>00287
<a name="l00288"></a>00288 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00289"></a>00289 <span class="keywordtype">void</span>
<a name="l00290"></a><a class="code" href="classdtn_1_1ContactManager.html#07720dcbbcd98f6e882f240dc4466b59">00290</a> <a class="code" href="classdtn_1_1ContactManager.html#07720dcbbcd98f6e882f240dc4466b59" title="Event handler when a link becomes unavailable.">ContactManager::handle_link_unavailable</a>(<a class="code" href="classdtn_1_1LinkUnavailableEvent.html" title="Event class for link unavailable events.">LinkUnavailableEvent</a>* event)
<a name="l00291"></a>00291 {
<a name="l00292"></a>00292 oasys::ScopeLock l(&<a class="code" href="classdtn_1_1ContactManager.html#2748e832f0ce4a43762af436e744dfdc" title="Lock to protect internal data structures.">lock_</a>, <span class="stringliteral">"ContactManager::handle_link_unavailable"</span>);
<a name="l00293"></a>00293
<a name="l00294"></a>00294 <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a> link = <span class="keyword">event</span>->link_;
<a name="l00295"></a>00295 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(link != NULL);
<a name="l00296"></a>00296
<a name="l00297"></a>00297 <span class="keywordflow">if</span> (!<a class="code" href="classdtn_1_1ContactManager.html#b7beecc3d70f0917ac6c94b05c134320" title="Check if contact manager already has this link.">has_link</a>(link)) {
<a name="l00298"></a>00298 log_warn(<span class="stringliteral">"ContactManager::handle_link_unavailable: "</span>
<a name="l00299"></a>00299 <span class="stringliteral">"link %s does not exist"</span>, link->name());
<a name="l00300"></a>00300 <span class="keywordflow">return</span>;
<a name="l00301"></a>00301 }
<a name="l00302"></a>00302
<a name="l00303"></a>00303 <span class="keywordflow">if</span>(link->isdeleted())
<a name="l00304"></a>00304 {
<a name="l00305"></a>00305 log_warn(<span class="stringliteral">"ContactManager::handle_link_unavailable: "</span>
<a name="l00306"></a>00306 <span class="stringliteral">"link %s is being deleted"</span>, link->name());
<a name="l00307"></a>00307 <span class="keywordflow">return</span>;
<a name="l00308"></a>00308 }
<a name="l00309"></a>00309
<a name="l00310"></a>00310 <span class="comment">// don't do anything for links that aren't ondemand or alwayson</span>
<a name="l00311"></a>00311 <span class="keywordflow">if</span> (link->type() != <a class="code" href="classdtn_1_1Link.html#a93653796d33692c67c415afd1edf61eeacf2159ea9fd169ca07c9f9891309ec" title="The link is expected to be either always available, or can be made available easily...">Link::ONDEMAND</a> && link->type() != <a class="code" href="classdtn_1_1Link.html#a93653796d33692c67c415afd1edf61eb2b2a3f569e0a11e5277b2428253137d" title="The link is expected to be ALWAYS available, and any convergence layer connection...">Link::ALWAYSON</a>) {
<a name="l00312"></a>00312 log_debug(<span class="stringliteral">"ContactManager::handle_link_unavailable: "</span>
<a name="l00313"></a>00313 <span class="stringliteral">"ignoring link unavailable for link of type %s"</span>,
<a name="l00314"></a>00314 link->type_str());
<a name="l00315"></a>00315 <span class="keywordflow">return</span>;
<a name="l00316"></a>00316 }
<a name="l00317"></a>00317
<a name="l00318"></a>00318 <span class="comment">// or if the link wasn't broken but instead was closed by user</span>
<a name="l00319"></a>00319 <span class="comment">// action or by going idle</span>
<a name="l00320"></a>00320 <span class="keywordflow">if</span> (event-><a class="code" href="classdtn_1_1ContactEvent.html#1f6f825ff0051afb3432f2983adc8abf" title="reason code for the event">reason_</a> == <a class="code" href="classdtn_1_1ContactEvent.html#e20f7357509a2bcca3d8e6c8daf552f72e449a76cefd484940a3f3bfc07d188e" title="User action (i.e. console / config).">ContactEvent::USER</a> ||
<a name="l00321"></a>00321 event-><a class="code" href="classdtn_1_1ContactEvent.html#1f6f825ff0051afb3432f2983adc8abf" title="reason code for the event">reason_</a> == <a class="code" href="classdtn_1_1ContactEvent.html#e20f7357509a2bcca3d8e6c8daf552f7cc4b8963a82f22c0d9b61c37e06e877e" title="Idle connection shut down by the CL.">ContactEvent::IDLE</a>)
<a name="l00322"></a>00322 {
<a name="l00323"></a>00323 log_debug(<span class="stringliteral">"ContactManager::handle_link_unavailable: "</span>
<a name="l00324"></a>00324 <span class="stringliteral">"ignoring link unavailable due to %s"</span>,
<a name="l00325"></a>00325 event-><a class="code" href="classdtn_1_1ContactEvent.html#9ce1fd3e3d0a1c675a90423eefac8a6e" title="Reason to string conversion.">reason_to_str</a>(event-><a class="code" href="classdtn_1_1ContactEvent.html#1f6f825ff0051afb3432f2983adc8abf" title="reason code for the event">reason_</a>));
<a name="l00326"></a>00326 <span class="keywordflow">return</span>;
<a name="l00327"></a>00327 }
<a name="l00328"></a>00328
<a name="l00329"></a>00329 <span class="comment">// adjust the retry interval in the link to handle backoff in case</span>
<a name="l00330"></a>00330 <span class="comment">// it continuously fails to open, then schedule the timer. note</span>
<a name="l00331"></a>00331 <span class="comment">// that if this is the first time the link is opened, the</span>
<a name="l00332"></a>00332 <span class="comment">// retry_interval will be initialized to zero so we set it to the</span>
<a name="l00333"></a>00333 <span class="comment">// minimum here. the retry interval is reset in the link open</span>
<a name="l00334"></a>00334 <span class="comment">// event handler.</span>
<a name="l00335"></a>00335 <span class="keywordflow">if</span> (link->retry_interval_ == 0) {
<a name="l00336"></a>00336 link->retry_interval_ = link->params().min_retry_interval_;
<a name="l00337"></a>00337 }
<a name="l00338"></a>00338
<a name="l00339"></a>00339 <span class="keywordtype">int</span> timeout = link->retry_interval_;
<a name="l00340"></a>00340 link->retry_interval_ *= 2;
<a name="l00341"></a>00341 <span class="keywordflow">if</span> (link->retry_interval_ > link->params().max_retry_interval_) {
<a name="l00342"></a>00342 link->retry_interval_ = link->params().max_retry_interval_;
<a name="l00343"></a>00343 }
<a name="l00344"></a>00344
<a name="l00345"></a>00345 <a class="code" href="classdtn_1_1ContactManager_1_1LinkAvailabilityTimer.html" title="Timer class used to re-enable broken ondemand links.">LinkAvailabilityTimer</a>* timer = <span class="keyword">new</span> <a class="code" href="classdtn_1_1ContactManager.html#98ebc5cec64f79d77a11fef41e91c143">LinkAvailabilityTimer</a>(<span class="keyword">this</span>, link);
<a name="l00346"></a>00346
<a name="l00347"></a>00347 AvailabilityTimerMap::value_type <a class="code" href="num2sdnv_8c.html#455b3605dc605fe8e055b9c1470535cf">val</a>(link, timer);
<a name="l00348"></a>00348 <span class="keywordflow">if</span> (<a class="code" href="classdtn_1_1ContactManager.html#1176e45365aed6d561b8f39cacb72e57">availability_timers_</a>.insert(val).second == <span class="keyword">false</span>) {
<a name="l00349"></a>00349 log_err(<span class="stringliteral">"ContactManager::handle_link_unavailable: "</span>
<a name="l00350"></a>00350 <span class="stringliteral">"error inserting timer for link %s into table!"</span>, link->name());
<a name="l00351"></a>00351 <span class="keyword">delete</span> timer;
<a name="l00352"></a>00352 <span class="keywordflow">return</span>;
<a name="l00353"></a>00353 }
<a name="l00354"></a>00354
<a name="l00355"></a>00355 log_debug(<span class="stringliteral">"link %s unavailable (%s): scheduling retry timer in %d seconds"</span>,
<a name="l00356"></a>00356 link->name(), <span class="keyword">event</span>->reason_to_str(event-><a class="code" href="classdtn_1_1ContactEvent.html#1f6f825ff0051afb3432f2983adc8abf" title="reason code for the event">reason_</a>), timeout);
<a name="l00357"></a>00357 timer->schedule_in(timeout * 1000);
<a name="l00358"></a>00358 }
<a name="l00359"></a>00359
<a name="l00360"></a>00360 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00361"></a>00361 <span class="keywordtype">void</span>
<a name="l00362"></a><a class="code" href="classdtn_1_1ContactManager.html#d5bec308777a9655952aa729e9702a21">00362</a> <a class="code" href="classdtn_1_1ContactManager.html#d5bec308777a9655952aa729e9702a21" title="Event handler when a link is opened successfully.">ContactManager::handle_contact_up</a>(<a class="code" href="classdtn_1_1ContactUpEvent.html" title="Event class for contact up events.">ContactUpEvent</a>* event)
<a name="l00363"></a>00363 {
<a name="l00364"></a>00364 oasys::ScopeLock l(&<a class="code" href="classdtn_1_1ContactManager.html#2748e832f0ce4a43762af436e744dfdc" title="Lock to protect internal data structures.">lock_</a>, <span class="stringliteral">"ContactManager::handle_contact_up"</span>);
<a name="l00365"></a>00365
<a name="l00366"></a>00366 <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a> link = <span class="keyword">event</span>->contact_->link();
<a name="l00367"></a>00367 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(link != NULL);
<a name="l00368"></a>00368
<a name="l00369"></a>00369 <span class="keywordflow">if</span>(link->isdeleted())
<a name="l00370"></a>00370 {
<a name="l00371"></a>00371 log_warn(<span class="stringliteral">"ContactManager::handle_contact_up: "</span>
<a name="l00372"></a>00372 <span class="stringliteral">"link %s is being deleted, not marking its contact up"</span>, link->name());
<a name="l00373"></a>00373 <span class="keywordflow">return</span>;
<a name="l00374"></a>00374 }
<a name="l00375"></a>00375
<a name="l00376"></a>00376 <span class="keywordflow">if</span> (!<a class="code" href="classdtn_1_1ContactManager.html#b7beecc3d70f0917ac6c94b05c134320" title="Check if contact manager already has this link.">has_link</a>(link)) {
<a name="l00377"></a>00377 log_warn(<span class="stringliteral">"ContactManager::handle_contact_up: "</span>
<a name="l00378"></a>00378 <span class="stringliteral">"link %s does not exist"</span>, link->name());
<a name="l00379"></a>00379 <span class="keywordflow">return</span>;
<a name="l00380"></a>00380 }
<a name="l00381"></a>00381
<a name="l00382"></a>00382 <span class="keywordflow">if</span> (link->type() == <a class="code" href="classdtn_1_1Link.html#a93653796d33692c67c415afd1edf61eeacf2159ea9fd169ca07c9f9891309ec" title="The link is expected to be either always available, or can be made available easily...">Link::ONDEMAND</a> || link->type() == <a class="code" href="classdtn_1_1Link.html#a93653796d33692c67c415afd1edf61eb2b2a3f569e0a11e5277b2428253137d" title="The link is expected to be ALWAYS available, and any convergence layer connection...">Link::ALWAYSON</a>) {
<a name="l00383"></a>00383 log_debug(<span class="stringliteral">"ContactManager::handle_contact_up: "</span>
<a name="l00384"></a>00384 <span class="stringliteral">"resetting retry interval for link %s: %d -> %d"</span>,
<a name="l00385"></a>00385 link->name(),
<a name="l00386"></a>00386 link->retry_interval_,
<a name="l00387"></a>00387 link->params().min_retry_interval_);
<a name="l00388"></a>00388 link->retry_interval_ = link->params().min_retry_interval_;
<a name="l00389"></a>00389 }
<a name="l00390"></a>00390 }
<a name="l00391"></a>00391
<a name="l00392"></a>00392 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00393"></a>00393 <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a>
<a name="l00394"></a><a class="code" href="classdtn_1_1ContactManager.html#d6123f2dcfbba11d95100eb3cfb714bf">00394</a> <a class="code" href="classdtn_1_1ContactManager.html#d6123f2dcfbba11d95100eb3cfb714bf" title="Helper routine to find a link based on criteria:.">ContactManager::find_link_to</a>(<a class="code" href="classdtn_1_1ConvergenceLayer.html" title="The abstract interface for a convergence layer.">ConvergenceLayer</a>* cl,
<a name="l00395"></a>00395 <span class="keyword">const</span> std::string& nexthop,
<a name="l00396"></a>00396 <span class="keyword">const</span> <a class="code" href="classdtn_1_1EndpointID.html">EndpointID</a>& remote_eid,
<a name="l00397"></a>00397 <a class="code" href="classdtn_1_1Link.html#a93653796d33692c67c415afd1edf61e" title="Valid types for a link.">Link::link_type_t</a> type,
<a name="l00398"></a>00398 u_int states)
<a name="l00399"></a>00399 {
<a name="l00400"></a>00400 oasys::ScopeLock l(&<a class="code" href="classdtn_1_1ContactManager.html#2748e832f0ce4a43762af436e744dfdc" title="Lock to protect internal data structures.">lock_</a>, <span class="stringliteral">"ContactManager::find_link_to"</span>);
<a name="l00401"></a>00401
<a name="l00402"></a>00402 LinkSet::iterator iter;
<a name="l00403"></a>00403 <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a> link(<span class="stringliteral">"ContactManager::find_link_to: return value"</span>);
<a name="l00404"></a>00404
<a name="l00405"></a>00405 log_debug(<span class="stringliteral">"find_link_to: cl %s nexthop %s remote_eid %s "</span>
<a name="l00406"></a>00406 <span class="stringliteral">"type %s states 0x%x"</span>,
<a name="l00407"></a>00407 cl ? cl-><a class="code" href="classdtn_1_1ConvergenceLayer.html#1030bc8bf5d5ca898fad2433e30e44cf" title="Accessor for the convergence layer name.">name</a>() : <span class="stringliteral">"ANY"</span>,
<a name="l00408"></a>00408 nexthop.c_str(), remote_eid.<a class="code" href="classdtn_1_1EndpointID.html#c9d8a72806359621f4d2850c1e78269c">c_str</a>(),
<a name="l00409"></a>00409 type == <a class="code" href="classdtn_1_1Link.html#a93653796d33692c67c415afd1edf61e16f74d8b58f067027e718650590deef1">Link::LINK_INVALID</a> ? <span class="stringliteral">"ANY"</span> : <a class="code" href="classdtn_1_1Link.html#405aaca77bb12b2611ee49a8184b7829" title="Link type string conversion.">Link::link_type_to_str</a>(type),
<a name="l00410"></a>00410 states);
<a name="l00411"></a>00411
<a name="l00412"></a>00412 <span class="comment">// make sure some sane criteria was specified</span>
<a name="l00413"></a>00413 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>((cl != NULL) ||
<a name="l00414"></a>00414 (nexthop != <span class="stringliteral">""</span>) ||
<a name="l00415"></a>00415 (remote_eid != <a class="code" href="classdtn_1_1EndpointID.html#31bd1844cae5e71cc2393a139c9bec4c" title="Return the special endpoint id used for the null endpoint, namely &quot;dtn:none&quot;...">EndpointID::NULL_EID</a>()) ||
<a name="l00416"></a>00416 (type != <a class="code" href="classdtn_1_1Link.html#a93653796d33692c67c415afd1edf61e16f74d8b58f067027e718650590deef1">Link::LINK_INVALID</a>));
<a name="l00417"></a>00417
<a name="l00418"></a>00418 <span class="keywordflow">for</span> (iter = <a class="code" href="classdtn_1_1ContactManager.html#ade8809a7e4850c4a55fe497c14a8ca2" title="Set of all links.">links_</a>->begin(); iter != <a class="code" href="classdtn_1_1ContactManager.html#ade8809a7e4850c4a55fe497c14a8ca2" title="Set of all links.">links_</a>->end(); ++iter) {
<a name="l00419"></a>00419 <span class="keywordflow">if</span> ( ((type == <a class="code" href="classdtn_1_1Link.html#a93653796d33692c67c415afd1edf61e16f74d8b58f067027e718650590deef1">Link::LINK_INVALID</a>) || (type == (*iter)->type())) &&
<a name="l00420"></a>00420 ((cl == NULL) || ((*iter)->clayer() == cl)) &&
<a name="l00421"></a>00421 ((nexthop == <span class="stringliteral">""</span>) || (nexthop == (*iter)->nexthop())) &&
<a name="l00422"></a>00422 ((remote_eid == <a class="code" href="classdtn_1_1EndpointID.html#31bd1844cae5e71cc2393a139c9bec4c" title="Return the special endpoint id used for the null endpoint, namely &quot;dtn:none&quot;...">EndpointID::NULL_EID</a>()) ||
<a name="l00423"></a>00423 (remote_eid == (*iter)->remote_eid())) &&
<a name="l00424"></a>00424 ((states & (*iter)->state()) != 0) )
<a name="l00425"></a>00425 {
<a name="l00426"></a>00426 link = *iter;
<a name="l00427"></a>00427 log_debug(<span class="stringliteral">"ContactManager::find_link_to: "</span>
<a name="l00428"></a>00428 <span class="stringliteral">"matched link *%p"</span>, link.object());
<a name="l00429"></a>00429 <a class="code" href="SDNV_8cc.html#ca68c0d4ac8df0838e209fb5300f7be3">ASSERT</a>(!link->isdeleted());
<a name="l00430"></a>00430 <span class="keywordflow">return</span> link;
<a name="l00431"></a>00431 }
<a name="l00432"></a>00432 }
<a name="l00433"></a>00433
<a name="l00434"></a>00434 log_debug(<span class="stringliteral">"ContactManager::find_link_to: no match"</span>);
<a name="l00435"></a>00435 <span class="keywordflow">return</span> link;
<a name="l00436"></a>00436 }
<a name="l00437"></a>00437
<a name="l00438"></a>00438 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00439"></a>00439 <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a>
<a name="l00440"></a><a class="code" href="classdtn_1_1ContactManager.html#a0e0738c54cc947fb03f765f3afcb03c">00440</a> <a class="code" href="classdtn_1_1ContactManager.html#a0e0738c54cc947fb03f765f3afcb03c" title="Notification from a convergence layer that a new opportunistic link has come knocking...">ContactManager::new_opportunistic_link</a>(<a class="code" href="classdtn_1_1ConvergenceLayer.html" title="The abstract interface for a convergence layer.">ConvergenceLayer</a>* cl,
<a name="l00441"></a>00441 <span class="keyword">const</span> std::string& nexthop,
<a name="l00442"></a>00442 <span class="keyword">const</span> <a class="code" href="classdtn_1_1EndpointID.html">EndpointID</a>& remote_eid,
<a name="l00443"></a>00443 <span class="keyword">const</span> std::string* link_name)
<a name="l00444"></a>00444 {
<a name="l00445"></a>00445 log_debug(<span class="stringliteral">"new_opportunistic_link: cl %s nexthop %s remote_eid %s"</span>,
<a name="l00446"></a>00446 cl-><a class="code" href="classdtn_1_1ConvergenceLayer.html#1030bc8bf5d5ca898fad2433e30e44cf" title="Accessor for the convergence layer name.">name</a>(), nexthop.c_str(), remote_eid.<a class="code" href="classdtn_1_1EndpointID.html#c9d8a72806359621f4d2850c1e78269c">c_str</a>());
<a name="l00447"></a>00447
<a name="l00448"></a>00448 oasys::ScopeLock l(&<a class="code" href="classdtn_1_1ContactManager.html#2748e832f0ce4a43762af436e744dfdc" title="Lock to protect internal data structures.">lock_</a>, <span class="stringliteral">"ContactManager::new_opportunistic_link"</span>);
<a name="l00449"></a>00449
<a name="l00450"></a>00450 <span class="comment">// find a unique link name</span>
<a name="l00451"></a>00451 <span class="keywordtype">char</span> name[64];
<a name="l00452"></a>00452
<a name="l00453"></a>00453 <span class="keywordflow">if</span> (link_name) {
<a name="l00454"></a>00454 strncpy(name, link_name->c_str(), <span class="keyword">sizeof</span>(name));
<a name="l00455"></a>00455
<a name="l00456"></a>00456 <span class="keywordflow">while</span> (<a class="code" href="classdtn_1_1ContactManager.html#4a31131016ed7f6b11ce6823dd7abe91" title="Finds link corresponding to this name.">find_link</a>(name) != NULL) {
<a name="l00457"></a>00457 snprintf(name, <span class="keyword">sizeof</span>(name), <span class="stringliteral">"%s-%d"</span>,
<a name="l00458"></a>00458 link_name->c_str(), <a class="code" href="classdtn_1_1ContactManager.html#b6a08ccc691316966419782cd58cd0ce" title="Counter for opportunistic links.">opportunistic_cnt_</a>);
<a name="l00459"></a>00459
<a name="l00460"></a>00460 <a class="code" href="classdtn_1_1ContactManager.html#b6a08ccc691316966419782cd58cd0ce" title="Counter for opportunistic links.">opportunistic_cnt_</a>++;
<a name="l00461"></a>00461 }
<a name="l00462"></a>00462 }
<a name="l00463"></a>00463
<a name="l00464"></a>00464 <span class="keywordflow">else</span> {
<a name="l00465"></a>00465 <span class="keywordflow">do</span> {
<a name="l00466"></a>00466 snprintf(name, <span class="keyword">sizeof</span>(name), <span class="stringliteral">"link-%d"</span>,
<a name="l00467"></a>00467 <a class="code" href="classdtn_1_1ContactManager.html#b6a08ccc691316966419782cd58cd0ce" title="Counter for opportunistic links.">opportunistic_cnt_</a>);
<a name="l00468"></a>00468 <a class="code" href="classdtn_1_1ContactManager.html#b6a08ccc691316966419782cd58cd0ce" title="Counter for opportunistic links.">opportunistic_cnt_</a>++;
<a name="l00469"></a>00469 } <span class="keywordflow">while</span> (<a class="code" href="classdtn_1_1ContactManager.html#4a31131016ed7f6b11ce6823dd7abe91" title="Finds link corresponding to this name.">find_link</a>(name) != NULL);
<a name="l00470"></a>00470 }
<a name="l00471"></a>00471
<a name="l00472"></a>00472 <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a> link = <a class="code" href="classdtn_1_1Link.html#caf84c89199fccadfaecfc85a46d96f7" title="Static function to create appropriate link object from link type.">Link::create_link</a>(name, <a class="code" href="classdtn_1_1Link.html#a93653796d33692c67c415afd1edf61e692792332b57aa903a769cb33e3d366b" title="The link may or may not be available, based on uncontrollable factors.">Link::OPPORTUNISTIC</a>, cl,
<a name="l00473"></a>00473 nexthop.c_str(), 0, NULL);
<a name="l00474"></a>00474 <span class="keywordflow">if</span> (link == NULL) {
<a name="l00475"></a>00475 log_warn(<span class="stringliteral">"ContactManager::new_opportunistic_link: "</span>
<a name="l00476"></a>00476 <span class="stringliteral">"unexpected error creating opportunistic link"</span>);
<a name="l00477"></a>00477 <span class="keywordflow">return</span> link;
<a name="l00478"></a>00478 }
<a name="l00479"></a>00479
<a name="l00480"></a>00480 <a class="code" href="namespacedtn.html#6efb37e503f8062c537b022eb755b94e" title="Typedef for a reference on a link.">LinkRef</a> new_link(link.object(),
<a name="l00481"></a>00481 <span class="stringliteral">"ContactManager::new_opportunistic_link: return value"</span>);
<a name="l00482"></a>00482
<a name="l00483"></a>00483 new_link->set_remote_eid(remote_eid);
<a name="l00484"></a>00484
<a name="l00485"></a>00485 <span class="keywordflow">if</span> (!<a class="code" href="classdtn_1_1ContactManager.html#c0964b1fa4e2c5fc4c841d7261cf5929" title="Add a link if the contact manager does not already have a link by the same name.">add_new_link</a>(new_link)) {
<a name="l00486"></a>00486 new_link->delete_link();
<a name="l00487"></a>00487 log_err(<span class="stringliteral">"ContactManager::new_opportunistic_link: "</span>
<a name="l00488"></a>00488 <span class="stringliteral">"failed to add new opportunistic link %s"</span>, new_link->name());
<a name="l00489"></a>00489 new_link = NULL;
<a name="l00490"></a>00490 }
<a name="l00491"></a>00491
<a name="l00492"></a>00492 <span class="keywordflow">return</span> new_link;
<a name="l00493"></a>00493 }
<a name="l00494"></a>00494
<a name="l00495"></a>00495 <span class="comment">//----------------------------------------------------------------------</span>
<a name="l00496"></a>00496 <span class="keywordtype">void</span>
<a name="l00497"></a><a class="code" href="classdtn_1_1ContactManager.html#4c93f54d72238524d5215abbac4138b9">00497</a> <a class="code" href="classdtn_1_1ContactManager.html#4c93f54d72238524d5215abbac4138b9" title="Dump a string representation of the info inside contact manager.">ContactManager::dump</a>(oasys::StringBuffer* <a class="code" href="num2sdnv_8c.html#a81cdcc7ff6987bc85c073253e32715f">buf</a>)<span class="keyword"> const</span>
<a name="l00498"></a>00498 <span class="keyword"></span>{
<a name="l00499"></a>00499 oasys::ScopeLock l(&<a class="code" href="classdtn_1_1ContactManager.html#2748e832f0ce4a43762af436e744dfdc" title="Lock to protect internal data structures.">lock_</a>, <span class="stringliteral">"ContactManager::dump"</span>);
<a name="l00500"></a>00500
<a name="l00501"></a>00501 buf->append(<span class="stringliteral">"Links:\n"</span>);
<a name="l00502"></a>00502 LinkSet::iterator iter;
<a name="l00503"></a>00503 <span class="keywordflow">for</span> (iter = <a class="code" href="classdtn_1_1ContactManager.html#ade8809a7e4850c4a55fe497c14a8ca2" title="Set of all links.">links_</a>->begin(); iter != <a class="code" href="classdtn_1_1ContactManager.html#ade8809a7e4850c4a55fe497c14a8ca2" title="Set of all links.">links_</a>->end(); ++iter) {
<a name="l00504"></a>00504 buf->appendf(<span class="stringliteral">"*%p\n"</span>, (*iter).object());
<a name="l00505"></a>00505 }
<a name="l00506"></a>00506 }
<a name="l00507"></a>00507
<a name="l00508"></a>00508 } <span class="comment">// namespace dtn</span>
</pre></div></div>
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